Isayensi Eyisisekelo Yobunjiniyela Bezimoto Ezinamasondo Amane
Injini yemoto enamasondo amane "inhliziyo" eguqula amandla kusuka kuphethiloli abe amandla e-kinetic, bese iwasabalalisa ukuze imoto ikwazi ukuhamba kahle nangokulawuleka. Ukuqonda izisekelo zesayensi yezinjini zezimoto akuzuzisi nje kuphela kubafundi bezimoto noma ochwepheshe kodwa nakubanikazi bezimoto, kubasize baqaphele kakhudlwana izimpawu zomonakalo, benze ukulungiswa okuyisisekelo, futhi baqonde ukuthi imoto isebenza kanjani ngokujwayelekile. Lesi sihloko sixoxa ngemibono eyisisekelo yenjini yemoto, izingxenye zayo eziyinhloko, izinqubo zokusebenza, izinhlelo ezisekelayo, kanye nezimiso zokulungisa.
1. Ukuqonda Imishini Nemisebenzi Yayo Eyinhloko
Izinjini zezimoto ngokuvamile ziyizinjini zokushisa zangaphakathi, ezikhiqiza amandla ngokushisa ingxube yomoya kanye nophethiloli ekamelweni lokushisa. Amandla okushisa avela ekushiseni aguqulwa abe amandla omshini ngesimo sokunyakaza okuphindaphindayo kwepiston, okube sekuguqulwa kube ukujikeleza nge-crankshaft. Lokhu kujika kube sekudluliselwa ngohlelo lokudlulisa amandla, ekugcineni kuphendule amasondo.
Imisebenzi eyinhloko yenjini yemoto enamasondo amane ifaka:
1. Khiqiza amandla okuhambisa imoto.
2. Inikeza amandla ezinhlelweni zokusekela ezifana ne-alternator (kagesi), i-AC compressor, kanye nephampu yokuqondisa amandla (ezinhlotsheni ezithile).
3. Gcina ukuzinza kokusebenza ngaphansi kwezimo ezahlukahlukene zomthwalo nokujikeleza.
2. Izinhlobo Zezinjini Ezimotweni
Ngokuvamile, izinjini zezimoto zingahlukaniswa ngokusekelwe ezinhlotsheni eziningana:
a. Ngokusekelwe kuMjikelezo Womsebenzi
– Injini enezinhlungu ezine: iqukethe ukushaya kwe-intake, ukucindezela, ukushisa, kanye nokushaya kwe-exhaust. Lolu uhlobo oluvame kakhulu olusetshenziswa ezimotweni zabagibeli.
– Injini ye-2-stroke: ilula kodwa iyachitha futhi inokukhishwa okuphezulu komoya, ayisetshenziswa kakhulu ezimotweni zesimanje.
b. Ngokusekelwe endleleni yokushisa
– Injini kaphethiloli (ukushiswa kwe-spark): isebenzisa ama-spark plugs ukuze ishise.
– Injini yedizili (ukushiswa kokucindezela): ukushiswa kukaphethiloli ngenxa yokushisa okuphezulu ngenxa yokucindezelwa komoya.
c. Ngokusekelwe ku-Layout yesilinda
– Imigqa (emigqeni): amasilinda aqondile, avamile ezimotweni zansuku zonke.
– Injini engu-V: amasilinda akha isimo esingu-V, amandla amakhulu kanye nomklamo omncane kakhulu wenani elikhulu lamasilinda.
– Ibhokisi/isicaba: amasilinda aphikisana ngokuvundlile, isikhungo esiphansi samandla adonsela phansi.
3. Izingxenye Eziyinhloko Zenjini Nemisebenzi Yazo
Ukuze usebenze, umshini wakhiwe yizingxenye eziningi ezixhumene. Nazi izingxenye eziyisisekelo kakhulu:
1. Ibhulokhi yesilinda: igcina isilinda lapho i-piston ihamba khona iye phezulu naphansi. Ngaphakathi kwayo kunezindlela zamafutha namanzi okupholisa.
2. Ikhanda lesilinda: limboza ingxenye ephezulu yesilinda futhi ligcina amavalvu, ama-spark plug/injectors, kanye nemigudu yokungenisa nokukhipha umoya.
3. I-piston: iyahamba iye emuva naphambili kusilinda ukuze ithole ingcindezi yokushisa.
4. Indandatho yepiston: igcina ukucindezelwa futhi ivimbela uwoyela ukuthi ungangeni ekamelweni lokushisa.
5. Induku yepiston (induku yokuxhuma): ixhuma i-piston ne-crankshaft.
6. I-Crankshaft: iguqula ukunyakaza okuphindaphindayo kube ukujikeleza.
7. I-Camshaft: ilawula ukuvulwa nokuvalwa kwamavalvu ngokwesikhathi.
8. Amavalvu okungenisa kanye nawokukhipha umoya: alawula ukuhamba komoya/uphethiloli kanye negesi yokukhipha umoya.
9. Ibhande/uchungechunge lwesikhathi: livumelanisa ukujikeleza kwe-crankshaft kanye ne-camshaft.
Ukuqonda umsebenzi walezi zingxenye kubalulekile, ngoba izinkinga eziningi zenjini ziqala ekugugeni, ukuvuza, noma ukusebenza okungavumelanisiwe phakathi kwezingxenye.
4. Isimiso Sokusebenza Senjini Ye-Stroke Ene-4
Izimoto eziningi zesimanje zisebenzisa injini ye-4-stroke. Umjikelezo umi kanje:
1. I-stroke yokungenisa
I-piston iyehla, i-valve yokungenisa iyavuleka, ingxube yomoya-kaphethiloli (noma umoya nje kudizili) ingena kwisilinda.
2. Ukushaya kokucindezela
I-piston iyakhuphuka, ama-valve womabili ayavaleka, bese ingxube yomoya nophethiloli iyacindezelwa. Enjinini kaphethiloli, i-spark plug iyavutha ekugcineni kokucindezelwa; enjinini kadizili, uphethiloli uyafakwa lapho umoya usuvele ushisa ngenxa yokucindezelwa.
3. Ukushaya ngamandla
Kuqala ukusha, futhi ingcindezi iphoqa i-piston phansi ngamandla. Lona umthombo oyinhloko wamandla enjini.
4. Ukushaya komoya ophumayo
I-piston iya phezulu, i-valve yokukhipha umoya iyavuleka, bese amagesi okushisa asele ephuma eya emkhunjini wokukhipha umoya.
Umjikelezo owodwa ophelele udinga ukujikeleza okubili kwe-crankshaft. Isikhathi esinembile phakathi kwama-piston nama-valve siyisihluthulelo sokusebenza kahle, amandla, kanye nokukhishwa kwegesi.
5. Uhlelo Lokusekela Umshini
Umshini ngeke usebenze kahle ngaphandle kwezinhlelo ezisekelayo. Ezinye izinhlelo ezibalulekile yilezi:
a. Uhlelo Lukaphethiloli
Izimoto zanamuhla ngokuvamile zisebenzisa i-fuel injection (EFI). Izinzwa ezifana ne-MAF/MAP sensor, i-O2 sensor, kanye ne-TPS zithumela idatha ku-ECU ukuze kunqunywe inani elifanele likaphethiloli. Izinhlelo zokujova uphethiloli zisebenza kahle kakhulu kune-carburetor ngenxa yokulawula kwazo okunembile.
b. Uhlelo Lokuvutha (injini kaphethiloli)
Uhlelo lokukhanyisa luqukethe ibhethri, ikhoyili, ipulaki yenhlansi, kanye ne-ECU/igniter. Ikhoyili ikhulisa i-voltage ukuze ipulaki yenhlansi ikwazi ukukhiqiza inhlansi enamandla ngesikhathi esifanele.
c. Uhlelo Lokugcoba
Uwoyela wenjini unciphisa ukungqubuzana, upholisa izingxenye, uhlanza ukungcola, futhi uvimbele ukugqwala. Izingxenye ezibalulekile zifaka phakathi iphampu kawoyela, isihlungi sikawoyela, kanye nemigqa kawoyela. Ukuntuleka kwamafutha noma uwoyela owohlokayo kungabangela ukuguguleka okukhulu ngisho nokwehluleka kwenjini.
d. Uhlelo Lokupholisa
Ukushisa kukhiqiza ukushisa okuphezulu. Uhlelo lokupholisa lugcina izinga lokushisa elifanele lokusebenza (ngokuvamile cishe cishe ku-80–95°C). Izingxenye zalo eziyinhloko yi-radiator, iphampu yamanzi, i-thermostat, ifeni ye-radiator, kanye ne-coolant. Ukushisa ngokweqile kuyisitha esikhulu senjini, njengoba kungalimaza i-gasket yekhanda lesilinda, kugobe ikhanda, noma kuqhekeze ibhloko.
e. Izinhlelo Zokukhipha Umoya Nokukhipha Umoya
Amagesi okukhipha umoya adluliselwa nge-manifold, i-catalytic converter, kanye ne-muffler. I-catalytic converter inciphisa ukungcola. Inzwa ye-oxygen isiza i-ECU ukulawula ingxube kaphethiloli ukuze kube nokukhishwa okuphansi komoya kanye nokonga uphethiloli.
6. Amandla, I-Torque, kanye Nokusebenza Kahle
Ezweni lezimoto, amagama amabili ayinhloko yilawa:
– I-Torque: “amandla okujikeleza” azwakala lapho imoto iqala ukuhamba noma ukukhuphuka intaba.
– Amandla (amandla ehhashi/PS/kW): ikhono lokukhiqiza umsebenzi ngeyunithi yesikhathi, elizwakala ngesivinini esiphezulu noma ukusheshisa okuqhubekayo.
Injini enhle ayigcini nje ngokuba namandla, kodwa futhi isebenza kahle. Ukusebenza kahle kuthonywa yisilinganiso sokucindezela, ikhwalithi yokushisa, ukungqubuzana kwangaphakathi, ukwakheka kwegumbi lokushisa, kanye namasu e-ECU njenge-variable valve timing (VVT) ezimotweni zesimanje.
7. Ukulungiswa Okuyisisekelo Ukuze Umshini Wakho Uhlale Isikhathi Eside
Ulwazi oluyisisekelo lobunjiniyela bemishini luhlobene nemikhuba yokulungisa. Ezinye izinyathelo ezibalulekile:
1. Shintsha uwoyela bese uhlanza njalo ngokwezincomo zomenzi.
2. Sebenzisa uphethiloli ngokwe-octane/cetane ukuze ushise kahle.
3. Hlola i-coolant bese uqinisekisa ukuthi akukho ukuvuza.
4. Hlanza isihlungi somoya ukuze umoya ungavimbeki.
5. Qaphela izimpawu zokuqala ezifana nokuxhuga kwenjini, intuthu eningi, amazinga okushisa akhuphukayo, noma imisindo erhabaxa.
6. Seva uhlelo lokujova kanye nolokuthungela uma ukusebenza kwehla noma ukusetshenziswa kukaphethiloli kuchitha imali.
Imikhuba yokushayela nayo inethonya: ukufudumeza injini ngokwanele, ukungaphoqeleli njalo ukujikeleza okuphezulu lapho injini isabanda, kanye nokugcina umthwalo wemoto usezingeni.
Isiphetho
Izisekelo zesayensi yenjini yemoto enamasondo amane zifaka phakathi ukuqonda izimiso zokusha, indlela yokunyakaza kwe-piston ibe ukujikeleza, kanye nezinhlelo zokusekela uphethiloli, ukuthungela, ukugcoba, ukupholisa, kanye nokukhishwa kwegesi. Ngokuqonda izingxenye eziyinhloko nokuthi injini enezitezi ezine isebenza kanjani, singabona kalula izinkinga, senze ukulungiswa okuyisisekelo, futhi silondoloze ukusebenza kahle kwenjini. Injini enakekelwe kahle ayigcini nje ngokuhlala isikhathi eside kodwa futhi igcina uphethiloli kahle futhi inobungani nemvelo.
Uma ufisa, ngingaguqula lesi sihloko sibe yinguqulo ephelele yesabelo sesikole enesakhiwo (isingeniso-ukwakheka kwenkinga-ingxoxo-isiphetho-uhlu lwezincwadi) noma ngenze inguqulo yobuchwepheshe kakhulu (isibonelo, ngigxile ku-EFI, i-ECU, kanye nokuxilongwa kwamaphutha).
